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湿地松是我国广泛引种的树种之一,合理地加强田间管理,对促进幼苗生长发育,提高苗木产量、质量有重要作用。近年来,我们对湿地松播种育苗的生长发育过程作了一些观察,认为应划分为四个管
Slash pine is one of the widely introduced species in our country. It is of great importance to strengthen field management and promote the growth and development of seedlings and the yield and quality of seedlings. In recent years, we have made some observations on the growth and development of sowing seeding slash pine that should be divided into four tubes